Wilson BLX Tour Squash Racquet (2012 model) Basalt fibers are woven longitudinally with Karophite Black filtering unwanted vibrations delivering a crisp, perfect feel Linear geometry yields 35-Percent more stability than the competitor Power hole grommet technology allows for 56 degree string movement creating a sweet spot that is 26-Percent bigger than the average squash racquet 72.5 square inch headsize, 138 grams, balance is 35.7 cm